<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
   
    <template id="my-app">
      <div>
        <h2>{{message}}</h2>
        {{firstName + " " + lastName}}
        {{score >= 60 ? score : '不及格'}}
        {{message.split(" ").reverse().join(" ")}}
        {{fullName}}
        {{result}}
        {{reverseMessage}}
      </div>
    </template>

    <script src="../vue/vue.js"></script>
    <script>
        const App = {
            template: '#my-app',
            data() {
                return {
                    firstName: 'leon',
                    lastName: 'Code',
                    score: 80,
                    message: "hello world"
                }
            },
            computed: {
                // 定义计算属性
                fullName() {
                    return this.firstName + " " + this.lastName;
                },
                result() {
                    return this.score >= 60 ? this.score : '不及格'
                },
                reverseMessage() {
                    return this.message.split(" ").reverse().join(" ")
                }
            }
        }

        Vue.createApp(App).mount('#app');
    </script>
</body>
</html>